Beveling and sealing clamp



May 25 1926. 1,585,918

w. F. iRRGANG' BEVELING AND SEALING CLAMP Fild August l2,' 1925 IN V ENTOR.

P BY Patented May 25, 1926.

UNITED STATES ATENT FFlCE.

WILLl'AllI F. IRRGANG, F CHICOPEE, MASSACHUSETTS, ASSIGNOR TO THE FISKRUB- BER COMEAN'Y, OF CI-IIGOPEE FALLS, MASSACHUSETTS, A CORPORATION OFMASSA- CHUSETTS.

BEVELING All?) SEALTEJG CLAMP.

Application filed. August 12, 1925. Serial No. 49,639.

My present invention relates to devices for sealing the ends of rubbertubes to mandrels during vulcanization and for simultaneously skivingthe ends of the tubes so as to prepare them for splicing into endlessform at a later stage. One object of the present invention is to providea clamp which will in operation be entirely selfcoutained, all partsbeing united into one 0 piece which may be handled as a unit. An-

other object is to provide a clamp which may be slipped over the end ofthe tube and tightened in place by a simple motion readily performed bymachinery. Another object is to provide a clamp in which the means whichhold it closed on the tube are of the utmost simplicity, both as totheir construction and their operation. Other and further objects willappear from the 0 following description and claims.

Referring to the drawings,

Fig. 1 is an end view of a clamp constructed in accordance with myinvention;

Fig. 2 is a sectional view of the same,

5 taken on line 2-2 of Fig. 3;

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2; and

Fig. 4 is a section on line Jrl of Fig. 2.

The clamp is enclosed in a casing l which contains all of the partsexcept two operating lugs which will be described later. At one pointthe casing is formed with an inwardly extending boss 11 which serves asa support for a flexible band 13 i which does the actual skiving of thetube. This band is made of spring metal formed in the shape of thefrustum of a cone and having its ends tapered as at 14 so as to overlapeach other and at the same time I present a smooth surface to therubber. The band may be attached to the boss 11. as by a rivet 1.5.Fitting closely within the casing 10, and sliding frictionally on theband 13 are two blocks 16, each provided i with lugs 17 extendingthrough slots 18 in the casing and projecting beyond the casing asmentioned before. The blocks have a running fit in the casing and havetheir inner surfaces grooved to receive the band 13 as is best shown inFig. &. The ends of the band 13 are preferably so arranged as to overlapwhen the clamp is in the expanded position of Fig. 1. By thisconstruction the ends of the band are always guided on each other duringthe closing movement and there is no danger of these ends becomingmisplaced with consequent mutilation of the tube.

In Fig. 1 the lugs 17 have been shown as in the positions that theyassume when the clamp is expanded so as to permit its application to orits removal from the tube. In Fig. 2 the lugs have been shown in thepositions they assume when the clamp is in place on the tube. Themounting of the band 13 is somewhat eccentric, being, in the position ofthe clamp as shown in the drawings. nearer the top of the casing thanits bottom. As the blocks are moved from the position of Fig. 1 to thatof Fig. 2, they bear on the band and cause the latter to contract uponthe underlying rubber. The ends of the band are so tapered that itsinner surface is maintained substantially circular during the closure ofthe clamp. As the clamp is closed by the action of the blocks in movingfrom the position of Fig. 1 to that of Fig. 2, the increasing frictionon the band will hold them tightly in place without the necessity forother means for this purpose. The clamp will retain itself in closedposition until it is desired to open it after vulcanization of the tube,when it is a simple matter to move the lugs back to the position of F 1.The band will thereupon spring back to the larger diameter and willpermit the clamp to be readily withdrawn from the tube.

The smaller edge of the band 18 is preferably formed with the innercorner 19 sharp in order to cut the rubber at this point and permit theremoval of any excess rubber before vulcanization. For a similar reasonthe edge of the blocks are cut away at 20. The action of the clamp inskiving the end of the tube is shown in Fig. 3, and it is thought thatthe operation of the device will be clear from what has been said.Changes in the construction of the parts may of course be made withinthe scope of the invention as pointed out in the following claims.

Having thus described my invention, 1 claim:

1. A. beveling and sealing clamp for use on rubber tubes which comprisesan outer casing, an inner flexible band secured in the casing and formedas the frustum of a relation to the band to cause the band to becontracted.

3. A beveling and sealing clamp for use with rubber tubes whichcomprises a casing,

asplit band eccentrically mounted in the casing, and a plurality ofblocks concentrically mounted in the casing and bearing frictionally onthe band, SLl(l blocks having lugs projecting outside the casing toafiord means whereby the clamp mav be operated.

WILLIAM F. lRRGANG,

